Blueprint detailing the method of fitting Packard type balance weights to a Bentley crankshaft.
| Identifier | ExFiles\Box 85\5\ scan0113 | |
| Date | 1st December 1937 guessed | |
| PINS 3 & 4. ON WEBS 1 & 12. 20° PINS 1 & 6. ON WEBS 6 & 7. METHOD OF FITTING PACKARD TYPE BALANCE WEIGHTS RM. {William Robotham - Chief Engineer} 89 TO BENTLEY CRANKSHAFT. | ||
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).